Electric transmission of intelligence.



No 848,751. PATENTED APR. 2. 1901.

- A .1, KITSEE.

ELECTRIC TRANSMISSION OF- INTELLIGENCE.

APPLICATION FILED AUG. 9, 1906.

THE "om-us PETERS co., WASHINGTON, D- c.

ISIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC TRANSMISSION OF INTELLIGENCE.

Specification of Letters Patent.

Patented April 2, 1907.

Application filed August 9,1906. Serial No. 329,886.

To col/Z whom it may concern:

Be it known that I, IsIDOR Krrsnn, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inElectric Transmission of Intelligence, of which the following is aspecification.

My invention relates to an improvement in electric transmission ofintelligence.

It has reference to lines in the region of inductive influence fromother lines.

In the drawings, Figure 1 represents indiagrammatic view a line oftransmission, two stations therefor, each embodying my invention. Fig. 2is a section of the adjustable converter.

1 is the line of transmission.

A and B are the two stations, each equipped with the sources of current6, impedance 5, transmitting-key 3 and 4, and the receiving device 2.

So far the arrangement is the usual one as employed on land-lines but ateach station a second path to the ground is established, and this pathis provided with the condenser 8 and the coil 9 of a converter. Thesecond coil (coil 10 of this converterl is, with the interposition ofthe condensers 11, connected to the receiving device 2.

I It is well known that condensers are an effectual bar to the flow of astraight or voltaic current, and it is equally well known thatimpedances have a retarding influence on the flow of induced currents.When, therefore, the operator manipulates his key and sends impulsesover the line, these impluses will not flow over the branch containingthe condenser 8 and coil 9. They will flow over the line and at theother station through the re ceiving device 2 and then to the ground. Ifimpulses are induced in the line from neighboring lines, these impulseswill flow to the greatest extent through these branches to the ground.They will induce impulses in the coil 9, whereby impulses will beinduced in the coil 10, and these impulses will neutralize any of theinduced impulses that may flow through that part of the line embracingthe receiver 2.

It is necessary that the operator shall be able to vary the relation ofcoil 10 to coil 9 so as to exactly counterbalance the effect of any ofthe impulses flowing directly from the line through the path containingthe receiving device 2, and in Fig. 2 I have illustrated one method ofvarying the relation of these two coils to each other. This methodconsists simply therein that the coil 9 is partially withdrawn from therecess of coil 10.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A line of transmission comprising means to neutralize the inducingeffect of other lines, said means embracing for the devices inserted insaid line a converter, one coil connected to part of the circuit withthe interposition of condensers and the second coil connected inmultiple arc to the receiving device to be protected.

2. In combination with a line of transmission and stations therefor,means to protect the receiving devices of said stations from theinfluence of impulses induced in said line, said means comprising apath. opaque to the flow of a voltaic current, said path connected withone terminal to the line and with the second terminal to the ground, onecoil of a converter inserted in said path and the second coil of saidconverter connected with the interposition of condensers to the deviceto be protected. I

3. As a means to protect devices inserted in a line of transmission fromthe inducing effect on neighboring lines, a converter for each of saiddevices, one coil connected in a grounded branch circuit and the secondcoil connected in multiple arc to the device to be protected, both coilsprovided with means to make the same opaque to the flow of a voltaic orstraight current.

In testimony whereof I afliX my signature in presence of two witnesses.

ISIDOB KITSEE.

Witnesses:

IVIARY C. SMITH, ALVAH RrrTENHoUsE.

